Fuel Cells are electrochemical devices that convert the chemical energy of a gaseous fuel directly into electricity. They are widely regarded as a potential future stationary and mobile power source. The response of a fuel cell system depends on the air and hydrogen feed, flow and pressure regulation, and heat and water management. In this paper, we develop a dynamic model suitable for the control study of fuel cell systems. The transient phenomena captured in the model include the flow and inertia dynamics of the compressor, the manifold filling dynamics (both anode and cathode), reactant partial pressures, and membrane humidity. It is important to note, however, that the fuel cell stack temperature is treated as a parameter rather than a state variable of this model because of its long time constant. Limitations and several possible applications of this model are presented.
Issue Section:
Technical Papers
Keywords:
compressors,
proton exchange membrane fuel cells,
fuel cell vehicles,
observability,
eigenvalues and eigenfunctions
Topics:
Compressors,
Flow (Dynamics),
Fuel cells,
Manifolds,
Membranes,
Pressure,
Temperature,
Anodes,
Water
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